A mother-of-three and self-proclaimed 'party animal' has cut down on booze because it left her with a burn-like rash and breathing problems.
Cass Bowman, 42, would drink an average of ten drinks on a night out - a mix of spirits, cider and lager.
But she began to suffer a mysterious reaction all over her body that would see her skin become red and blotchy as though she had been 'scalded'.
Mrs Bowen, of Barnsley, South Yorkshire, ignored her symptoms for two years, unable to give up the drink and her social life.
She eventually cut back when her nights out on the town left her short of breath and even struggling to speak.
Now, she is a fitness fanatic, running up to 18miles (30km) a week since regaining her health - but she fears she will have to give up alcohol altogether if her reactions ever return.
Cass Bowman, 42, a self-proclaimed 'party animal' has quit booze because an allergic reaction causes her skin to flare up all over her body and face, feeling like she had been 'scalded'
The mother-of-three first saw her skin flared up in mysterious red patterns eight years ago
Mrs Bowman cut back on her drinking and became a marathon runner. Pictured, before a race
Mrs Bowman, who has three children, Alex, 18, Oliver, 17 and Ellisia, 13, loved nothing more than to hit the town throughout the week with her friends through her 20s and 30s.
She said: 'Before all this, I was quite a party animal. I'd go out weekdays and weekends, downing pints and all sorts.'
When she first saw her skin flared up in mysterious red patterns eight years ago, in 2011, she didn't link it to her drinking.
Mrs Bowman noticed that she'd start to feel warm on the top half of her body and legs.
She wasn't especially worried, until odd marks soon began to spring up on her skin all over her body, including her face.
Mrs Bowen said: 'It was almost like a burn. My skin wouldn't be raised, like it would with a rash, but it'd be hot to touch and feel sensitive for days afterwards.
'Putting cold water on it wouldn't help, as it just heated up.
'When it would happen, people would really stare, which would make me feel embarrassed and put a dampener on the night.'
At first, Mrs Bowen, who is married to Stuart, 45, admitted that she didn't put two and two together, assuming the reaction was down to skin products or washing powder she was using.
Mrs Bowman, of Barnsley, Yorkshire, would go out drinking on weekdays and weeknights
Mrs Bowman would drink an average of ten drinks each night, a cocktail of spirits, cider and lager, and more on a celebration
Before the rash began to appear, Mrs Bowman noticed that she'd start to feel warm on the top half of her body and legs when she had a drink, but didn't think much of it
Mrs Bowman went to see a doctor in 2012, but struggled to give up her social life, filled with drinking, when he suggested it was due to alcohol
Mrs Bowman would 'try and press on and put up with' her symptoms for the next two years
Alcohol intolerance can cause immediate, uncomfortable reactions after you drink alcohol.
Alcohol intolerance is caused by a genetic condition in which the body can't break down alcohol efficiently.
This is most often found in Asians, people with asthma or hay fever (allergic rhinitis), people with an allergy to grains or to another food, or people with Hodgkin's lymphoma.
Although not a true allergy, in some cases, what seems to be alcohol intolerance may be your reaction to something in an alcoholic beverage.
These include sulfites or other preservatives, chemicals, grains or other
